I've been in the Von Maur store where the 8 people were killed. Had concealed carry been allowed within the store, I doubt that a citizen would have taken out the killer before he did himself in. First, given the number of people inside the store versus the number of Nebraska permit holders it is unlikely there would have been a permit holder in the store. Second, given the number of permit holders versus the number of permit holders that regularly carry, the potential of a legal citizen being in the store and able to help is further reduced. Third, even if a legally armed person were in the store, a concealable pistol would be an inferior weapon to the killer's rifle in a gunfight, and some people inside the store saw the killer and only at the last moment realized he was not an innocent shopper. Being able to verify who the killer was and getting into a position to take him out further reduces the probability that someone could have taken him out before he did it himself. However, the "no weapons" sign on the outside of the store virtually guaranteed the killer that he would not have to face any armed people making it a "safe-zone" for him.